Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quem venceu a 250 cc em 1987?
 ###Tabelas: CREATE TABLE moves_played_compared_with_computer_choices (moves_played_compared_with_computer_choices_id AUTO_INCREMENT PRIMARY KEY, Position INT, best year VARCHAR, best 2-year period VARCHAR, best 3-year period VARCHAR, best 5-year period VARCHAR, best 10-year period VARCHAR, best 15-year period VARCHAR) CREATE TABLE singles:_14_12–2 (singles:_14_12–2_id AUTO_INCREMENT PRIMARY KEY, Outcome VARCHAR, Date VARCHAR, Tournament VARCHAR, Surface VARCHAR, Opponent in the final VARCHAR, Score in the final VARCHAR) CREATE TABLE properties (properties_id AUTO_INCREMENT PRIMARY KEY, Lithium VARCHAR, Sodium VARCHAR, Potassium VARCHAR, Rubidium VARCHAR, Caesium VARCHAR) CREATE TABLE winners_of_the_swedish_motorcycle_grand_prix (winners_of_the_swedish_motorcycle_grand_prix_id AUTO_INCREMENT PRIMARY KEY, Year VARCHAR, Track VARCHAR, 125 cc VARCHAR, 250 cc VARCHAR, Report VARCHAR) CREATE TABLE commentators_and_spokespersons (commentators_and_spokespersons_id AUTO_INCREMENT PRIMARY KEY, Year(s) INT, Grand Final Television Commentator VARCHAR, Grand Final Dual Television Commentator VARCHAR, Spokesperson VARCHAR, Semi Final Television Commentator VARCHAR, Semi Final Dual Television Commentator VARCHAR)  
SELECT 250 cc FROM winners_of_the_swedish_motorcycle_grand_prix WHERE Year = 1987